Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The value of
– 
+ 
– .......... + 
is :
A
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
B
S = 30 C 0 30 C 20 – 30 C 1 30 C 19 + 30 C 2 30 C 18 ................
S = Co-efficient of x 20 in (1–x) 30 (1 + x) 30
S = Co-efficient of x 20 in (1–x 2 ) 30 = 30 C 10
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